./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:34:40,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:34:40,643 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:34:40,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:34:40,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:34:40,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:34:40,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:34:40,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:34:40,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:34:40,676 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:34:40,676 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:34:40,677 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:34:40,678 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:34:40,678 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:34:40,679 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:34:40,679 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:34:40,680 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:34:40,680 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:34:40,681 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:34:40,681 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:34:40,682 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:34:40,682 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:34:40,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:34:40,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:34:40,684 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:34:40,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:34:40,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:34:40,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:34:40,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:34:40,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:34:40,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:34:40,687 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:34:40,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:34:40,687 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:34:40,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:34:40,688 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:34:40,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:34:40,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:34:40,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:34:40,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:34:40,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:34:40,689 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:34:40,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:34:40,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:34:40,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:34:40,690 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:34:40,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:34:40,690 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 [2023-12-02 14:34:40,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:34:40,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:34:40,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:34:40,916 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:34:40,916 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:34:40,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2023-12-02 14:34:43,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:34:43,844 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:34:43,845 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2023-12-02 14:34:43,852 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/data/700421dec/3b2b980e8467472c94792dc4027a65ef/FLAGc306a7c8e [2023-12-02 14:34:43,863 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/data/700421dec/3b2b980e8467472c94792dc4027a65ef [2023-12-02 14:34:43,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:34:43,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:34:43,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:34:43,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:34:43,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:34:43,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:34:43" (1/1) ... [2023-12-02 14:34:43,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a43a400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:43, skipping insertion in model container [2023-12-02 14:34:43,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:34:43" (1/1) ... [2023-12-02 14:34:43,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:34:44,008 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2023-12-02 14:34:44,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:34:44,027 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:34:44,037 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2023-12-02 14:34:44,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:34:44,054 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:34:44,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44 WrapperNode [2023-12-02 14:34:44,055 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:34:44,056 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:34:44,056 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:34:44,056 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:34:44,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,083 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-12-02 14:34:44,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:34:44,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:34:44,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:34:44,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:34:44,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:34:44,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:34:44,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:34:44,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:34:44,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (1/1) ... [2023-12-02 14:34:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:34:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:44,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:34:44,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:34:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:34:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:34:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:34:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:34:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:34:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:34:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:34:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:34:44,225 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:34:44,227 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:34:44,321 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:34:44,352 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:34:44,352 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:34:44,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:34:44 BoogieIcfgContainer [2023-12-02 14:34:44,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:34:44,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:34:44,358 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:34:44,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:34:44,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:34:43" (1/3) ... [2023-12-02 14:34:44,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efde8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:34:44, skipping insertion in model container [2023-12-02 14:34:44,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:34:44" (2/3) ... [2023-12-02 14:34:44,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efde8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:34:44, skipping insertion in model container [2023-12-02 14:34:44,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:34:44" (3/3) ... [2023-12-02 14:34:44,364 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2023-12-02 14:34:44,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:34:44,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:34:44,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:34:44,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7773690b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:34:44,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:34:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 14:34:44,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:44,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 14:34:44,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 70716980, now seen corresponding path program 1 times [2023-12-02 14:34:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140950762] [2023-12-02 14:34:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:44,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140950762] [2023-12-02 14:34:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140950762] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:44,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:44,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:34:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960823175] [2023-12-02 14:34:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:44,687 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:44,720 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-12-02 14:34:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:34:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 14:34:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:44,730 INFO L225 Difference]: With dead ends: 15 [2023-12-02 14:34:44,730 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 14:34:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:44,736 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:44,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:34:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 14:34:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 14:34:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-02 14:34:44,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-12-02 14:34:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:44,769 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-02 14:34:44,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-02 14:34:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:34:44,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:44,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:34:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:34:44,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:44,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2136169335, now seen corresponding path program 1 times [2023-12-02 14:34:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:44,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179373773] [2023-12-02 14:34:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:44,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:44,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179373773] [2023-12-02 14:34:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179373773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:34:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390019980] [2023-12-02 14:34:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:44,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:44,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:34:44,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:34:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:44,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:34:44,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:34:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:45,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:34:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390019980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:34:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297520489] [2023-12-02 14:34:45,061 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:34:45,061 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:34:45,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:34:45,069 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:34:45,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:34:45,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:34:45,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:34:45,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:34:45,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:34:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 14:34:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569386568] [2023-12-02 14:34:45,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:34:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:34:45,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:34:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:34:45,526 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:45,550 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-12-02 14:34:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:34:45,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 14:34:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:45,551 INFO L225 Difference]: With dead ends: 16 [2023-12-02 14:34:45,551 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 14:34:45,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:34:45,553 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:45,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:34:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 14:34:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-02 14:34:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-02 14:34:45,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-12-02 14:34:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:45,558 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-02 14:34:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-02 14:34:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 14:34:45,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:45,559 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-12-02 14:34:45,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:34:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:45,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:45,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1075084148, now seen corresponding path program 2 times [2023-12-02 14:34:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:45,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136662488] [2023-12-02 14:34:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:45,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:45,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136662488] [2023-12-02 14:34:45,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136662488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:34:45,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132330048] [2023-12-02 14:34:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:34:45,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:45,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:34:45,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:34:45,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:34:45,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:34:45,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:34:45,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:34:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:46,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:34:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132330048] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:34:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038836686] [2023-12-02 14:34:46,076 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:34:46,077 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:34:46,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:34:46,077 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:34:46,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:34:46,222 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:34:46,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '186#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:34:46,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:34:46,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:34:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 14:34:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614770013] [2023-12-02 14:34:46,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:34:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:34:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:34:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:34:46,338 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:46,368 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-12-02 14:34:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:34:46,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 14:34:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:46,369 INFO L225 Difference]: With dead ends: 22 [2023-12-02 14:34:46,369 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 14:34:46,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:34:46,371 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:46,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:34:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 14:34:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 14:34:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-02 14:34:46,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2023-12-02 14:34:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:46,378 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-02 14:34:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-02 14:34:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 14:34:46,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:46,379 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-12-02 14:34:46,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:34:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:46,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:46,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1341689004, now seen corresponding path program 3 times [2023-12-02 14:34:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927946451] [2023-12-02 14:34:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:46,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:46,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927946451] [2023-12-02 14:34:46,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927946451] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:34:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275253020] [2023-12-02 14:34:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:34:46,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:46,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:46,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:34:46,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:34:46,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:34:46,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:34:46,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:34:46,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:34:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:46,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:34:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:47,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275253020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:34:47,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364400837] [2023-12-02 14:34:47,211 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:34:47,211 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:34:47,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:34:47,212 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:34:47,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:34:47,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:34:47,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:34:47,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:34:47,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:34:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 14:34:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590446019] [2023-12-02 14:34:47,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:34:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 14:34:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 14:34:47,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-12-02 14:34:47,489 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:47,547 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-12-02 14:34:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 14:34:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 14:34:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:47,549 INFO L225 Difference]: With dead ends: 34 [2023-12-02 14:34:47,549 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 14:34:47,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-12-02 14:34:47,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:47,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:34:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 14:34:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-02 14:34:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-02 14:34:47,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2023-12-02 14:34:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:47,559 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-02 14:34:47,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-02 14:34:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:34:47,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:47,560 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-12-02 14:34:47,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:34:47,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:47,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2114508012, now seen corresponding path program 4 times [2023-12-02 14:34:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:47,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416308136] [2023-12-02 14:34:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:47,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:48,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416308136] [2023-12-02 14:34:48,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416308136] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:34:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312624782] [2023-12-02 14:34:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:34:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:48,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:34:48,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:34:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:48,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:34:48,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:34:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:48,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:34:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312624782] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:34:49,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [540713747] [2023-12-02 14:34:49,197 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:34:49,197 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:34:49,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:34:49,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:34:49,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:34:49,307 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:34:49,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '684#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:34:49,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:34:49,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:34:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 14:34:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831450464] [2023-12-02 14:34:49,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:34:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 14:34:49,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 14:34:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 14:34:49,465 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:49,543 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2023-12-02 14:34:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 14:34:49,544 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:34:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:49,545 INFO L225 Difference]: With dead ends: 58 [2023-12-02 14:34:49,545 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 14:34:49,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 14:34:49,548 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:49,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:34:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 14:34:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-02 14:34:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-02 14:34:49,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2023-12-02 14:34:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:49,557 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-02 14:34:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:34:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-02 14:34:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 14:34:49,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:49,560 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-12-02 14:34:49,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:34:49,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:49,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:49,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash -779765100, now seen corresponding path program 5 times [2023-12-02 14:34:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:49,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606692500] [2023-12-02 14:34:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:51,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606692500] [2023-12-02 14:34:51,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606692500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:34:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208820703] [2023-12-02 14:34:51,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:34:51,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:34:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:34:51,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:34:51,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:35:25,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-02 14:35:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:35:25,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 14:35:25,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:35:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:35:25,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:35:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:35:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208820703] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:35:28,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370683320] [2023-12-02 14:35:28,488 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:35:28,489 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:35:28,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:35:28,489 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:35:28,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:35:28,583 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:35:28,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1293#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:35:28,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:35:28,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:35:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-12-02 14:35:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746963700] [2023-12-02 14:35:28,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:35:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-02 14:35:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-02 14:35:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 14:35:28,806 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:29,002 INFO L93 Difference]: Finished difference Result 106 states and 155 transitions. [2023-12-02 14:35:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 14:35:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-02 14:35:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:29,005 INFO L225 Difference]: With dead ends: 106 [2023-12-02 14:35:29,005 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 14:35:29,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 14:35:29,010 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:29,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:35:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 14:35:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 14:35:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-12-02 14:35:29,026 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2023-12-02 14:35:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-12-02 14:35:29,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-12-02 14:35:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 14:35:29,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:29,032 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2023-12-02 14:35:29,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:35:29,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:35:29,236 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:29,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1201625492, now seen corresponding path program 6 times [2023-12-02 14:35:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:29,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213260629] [2023-12-02 14:35:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:35:34,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:34,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213260629] [2023-12-02 14:35:34,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213260629] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:35:34,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472467779] [2023-12-02 14:35:34,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:35:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:35:34,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:35:34,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:35:34,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:35:34,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:35:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:35:34,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-02 14:35:34,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:35:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:35:34,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:35:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:35:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472467779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:35:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125724033] [2023-12-02 14:35:43,382 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:35:43,383 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:35:43,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:35:43,383 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:35:43,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:35:43,455 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:35:43,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2478#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:35:43,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:35:43,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:35:43,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2023-12-02 14:35:43,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080832789] [2023-12-02 14:35:43,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:35:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-12-02 14:35:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-12-02 14:35:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 14:35:43,778 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:44,259 INFO L93 Difference]: Finished difference Result 202 states and 299 transitions. [2023-12-02 14:35:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-02 14:35:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-12-02 14:35:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:44,261 INFO L225 Difference]: With dead ends: 202 [2023-12-02 14:35:44,261 INFO L226 Difference]: Without dead ends: 197 [2023-12-02 14:35:44,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 14:35:44,264 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:44,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:35:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-02 14:35:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-12-02 14:35:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2023-12-02 14:35:44,282 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2023-12-02 14:35:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:44,283 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2023-12-02 14:35:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:35:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2023-12-02 14:35:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 14:35:44,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:44,287 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2023-12-02 14:35:44,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:35:44,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:35:44,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:44,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1849387116, now seen corresponding path program 7 times [2023-12-02 14:35:44,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:44,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961831227] [2023-12-02 14:35:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:44,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:36:01,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:36:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961831227] [2023-12-02 14:36:01,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961831227] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:36:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644368476] [2023-12-02 14:36:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:36:01,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:36:01,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:36:01,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:36:01,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:36:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:02,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 192 conjunts are in the unsatisfiable core [2023-12-02 14:36:02,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:36:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:36:02,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:36:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:36:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644368476] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:36:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138249911] [2023-12-02 14:36:36,504 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 14:36:36,504 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:36:36,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:36:36,504 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:36:36,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:36:36,568 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:36:37,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4815#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem3#1|) (<= (+ |ULTIMATE.start_main_#t~mem3#1| 1) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 14:36:37,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:36:37,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:36:37,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2023-12-02 14:36:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680813993] [2023-12-02 14:36:37,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:36:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-12-02 14:36:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:36:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-12-02 14:36:37,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 14:36:37,075 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:36:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:36:39,289 INFO L93 Difference]: Finished difference Result 394 states and 587 transitions. [2023-12-02 14:36:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-12-02 14:36:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2023-12-02 14:36:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:36:39,292 INFO L225 Difference]: With dead ends: 394 [2023-12-02 14:36:39,292 INFO L226 Difference]: Without dead ends: 389 [2023-12-02 14:36:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 14:36:39,299 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:36:39,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:36:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-12-02 14:36:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2023-12-02 14:36:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:36:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2023-12-02 14:36:39,326 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2023-12-02 14:36:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:36:39,327 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2023-12-02 14:36:39,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:36:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2023-12-02 14:36:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-12-02 14:36:39,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:36:39,335 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2023-12-02 14:36:39,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:36:39,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:36:39,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:36:39,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:36:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1378413676, now seen corresponding path program 8 times [2023-12-02 14:36:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:36:39,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904426304] [2023-12-02 14:36:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:39,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:36:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:50,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904426304] [2023-12-02 14:37:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904426304] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:37:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675240319] [2023-12-02 14:37:50,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:37:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:37:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:37:50,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:37:50,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e595139-5123-4408-b67e-7738a6ad423d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process